Group 4. Jesse Adams-Doolittle Ryan Hoff Gino Mazzotti. Plug Loads Lighting Loads Electricity Demands Radiant Slab Natural Ventilation

Transcription

1 Group 4 Jesse Adams-Doolittle Ryan Hoff Gino Mazzotti Plug Loads Lighting Loads Electricity Demands Radiant Slab Natural Ventilation

2 Group 4 PLUG LOADS

3 Mode of Operation Maximum Consumption (W) Weekdays 9am-5pm Minimum Consumption (W) All other times Reduction during school breaks

4 System Diagram 393 Plug LoadCurrentDraw ( )

5 Object Hierarchy Building System Component Zone Zone Floor Building 3 rd Floor east 3 rd Floor y2e2 Electrical PlugLoad East 2 nd Floor 1 st Floor east east 2 nd Floor 1 st Floor y2e2 Basement east Basement

6 Plug Loads by Floor 3 rd Floor: Unoccupied: 40,00W Occupied: 0 W 2 nd Floor: Unoccupied: 3,000W Occupied: 6,000W 1 st Floor: Unoccupied: 4,000W Occupied: 7,000W Basement: Unoccupied: 10,000W Occupied: 15,000W Does the plug load distribution look correct? Yes (with exception to the 3 rd floor) Basement: Lots of lab equipment running day and night 1 st floor: most student activity, meeting rooms & offices 2 nd floor: slightly less student activity, meeting rooms & offices

7 Plug Load Zoom 1 Weekend

8 Closer Look Why a dip?

9 Object Hierarchy Building System Component Zone Zone Floor Building y2e2 Electrical Plug Load Current Draw Room 393 Room rd Floor y2e2

10 Room 393 Plug Loads Weekend

11 Group 4 LIGHTING LOADS

12 Mode of Operation Maximum Consumption (W) Weekdays 9am-5pm Minimum Consumption (W) All other times Reduction during school breaks

13 System Diagram 393 Lighting LoadCurrentDraw ( )

14 Object Hierarchy Building System Component Zone Zone Floor Building 3 rd Floor 3 rd Floor 3 rd Floor y2e2 Electrical Lighting Power 2 nd Floor 1 st Floor 2 nd Floor 1 st Floor 2 nd Floor 1 st Floor y2e2 Basement Basement Basement

15 Sensor Malfunction 1 2

16 3 rd Floor Lighting Load Minimum Consumption: 5kW (compared to 0kW 2kW on 1st Floor) Maximum Consumption: 15kW

17 Object Hierarchy Building System Component Zone Zone Floor Building y2e2 Electrical 393 Lighting Draw Room 393 Room 393 Third Floor y2e2

18 Room 393 Lighting Loads Weekend

19 Group 4 Y2E2 ELECTRICITY DEMANDS

20 Y2E2 Electrical Demand

21 SCADA System Diagram

22 kw Y2E2 Electrical Demand

23 2009 vs Problem #11 Sum of electrical sub meters << total electricity consumption This has been a problem, We are working with Cupertino Electric and Eaton Metering to resolve. This is on the Issues list Electrical

24 kw SCADA 2009 Data

25 kw SCADA 2011 Data

26 Data vs. Performance Outside Lighting Electrical Demand

27 Data vs. Performance 2 1

28 Data vs. Performance Café Electrical Demand 2 1

29 Mechanical Room Power vs. OAT

30 Recommendations Overall building electrical consumption has increased, why? Electrical data gives us a chance to look at overall performance (result of modes, set-points, interventions, etc.). Dedicate a team to decipher which loads are on each submeter. Incorporate the SCADA data into SEEIT database.

31 Group 4 RADIANT SLAB

32 Mode of Operation % Active Components: Pump and valve Off if outside air temperature > 78F Otherwise Turn on pump To reach steady state: Increase valve position by 10% (every 10 min) until temperature setpoint of 71F is met Decrease valve position by 5% (every 10 min) until temperature setpoint of 71F is met After reaching steady state Adjust valve position by 1% (every 10 min) only During unoccupied hours setpoint = 66F 1 1 min

33 System Diagram

34 Object Hierarchy Building System Component Zone Zone Floor Building y2e2 Tempered Hot Water Loop Radiant Slab Valve Position Radiant Slab 100 Space Temp First Floor y2e2 Radiant Slab 106 Space Temp 106

35 2009 Recommendations Problem Radiant slab valve position is only 0 or 120% open (should change in 10,5 or 1 % increments) Comments We did find problems with radiant slab in April. ISS modified programming. ISS has trended and validated sequence. Should have been Identified during commissioning Status Completed

36 2009 Data 1 2

37 2009 Data 1

38 2011 Data weekend Occupied Set point Unoccupied Set point

39 2011 Data 1 Occupied Set point Unoccupied Set Point

40 Group 4 NATURAL VENTILATION

41 Modes of Operation Active components: Operable windows, atria damper Initial range for natural ventilation outside air temperature 68 85F If outdoor temperature is within range & average space temperature > 70F -> open dampers For each zone where temperature > 70F open operable windows If zone temperature < 70F for at least 5 min close windows again If all windows around one atrium are closed also close corresponding atrium damper Night purge (if daytime outside air temperature exceeds 75F) During unoccupied hours open windows if outside air temperature < 65F and space temperature > 65F Close windows if space temperature < 63F

42 System Diagram

43 Object Hierarchy Building System Component Zone Zone Floor Building y2e2 Natural Ventilation Operable Windows Atria A Atria A First Floor y2e2

44 Yearly Use of Natural Ventilation

45 2009 vs Problems #21 Problem Night purge on the 1st and 2nd floor seems to be on a regular schedule rather than dependent on outside and inside temperatures Comments ISS has modified night flush programming. Status Completed

46 2009 Data

47 2009 Data Zoomed In

48 2011 Data

49 2011 Data Zoomed In

50 2009 vs Problems #22 Problem Purge on 3rd floor seems random and does not follow control strategy Comments ISS has modified night flush programming. Status Completed

51 2009 Data

52 2009 Data closed 1 open 2 Open Close

53 2011 Data closed 1 open

54 2011 Data closed open Close Windows Set Point

55 Group 4 RADIANT SLAB HEATING & NIGHT PURGE COOLING SIMULTANEOUSLY

56 Warning! Night Purge During unoccupied hours windows open if outside air temperature < 74 F (not 65) and space temperature > 74 F (not 65). Windows Close when space temperature < 65 F (not 63) Radiant Slab Radiant Slab is Heating when Temperature drops below 68.5 F (not 66) Sets up possible case for simultaneous Heating and Cooling of the 1 st Floor Atrium given daytime outside air temperature exceeds 75F to activate Night Purge 74 F 66 F 63 F 74 F 68.5 F 66 F 74 F 66 F Data Manual - Design Current Recommendation

57 May 9th

58 May 16th

59

60 Group 4 MAIN CHILLED WATER CONSUMPTION

61 System Diagram

62 Hierarchy Building System Component Zone Zone Floor Building Y2E2 Chilled Water Loop Atria A First Floor y2e2

63 Cooling [BTU] Temperature [F] Chilled Water Simulated Date Measured OutsideAirTemp-(1123)-[F]

64 Cooling [BTU] Temperature [F] Chilled Water 24/ Simulated Date Measured OutsideAirTemp-(1123)-[F]

65 Cooling [BTU] Difference in Simulated Schedules Date 24/7 Schedule 5 to 9 Schedule

66 Cooling [BTU] Chilled Water 24/7 with Higher Set Point Date Higher Setpoint Lower Setpoint

67 Cooling [BTU] Zoomed In Graph Date Higher Setpoint Lower Setpoint

68 Carbon Abatement High cost per lb of CO2 savings Probably not worth changing

69 Carbon Abatement $ Savings CO2 Savings $0.42/lb CO2 savings High cost/energy savings =low priority

70 Teach me how to Wiki Purpose of our Wiki: Easily allows multiple users to edit and update data on a webpage Allows us to compile all our work from the quarter in one spot so that future users can easily access what some of our findings Provide a clear understanding of our analysis and findings

71 Teach me how to Wiki Table of Contents Quickly choose what you want to explore

72 Teach me how to Wiki Guide for Users Tells you how to use wiki

73 Teach me how to Wiki Summary Object Hierarchy System Diagram

74 Teach me how to Wiki Points, Modes, rationale, set points, etc.,

75 Teach me how to Wiki Graphs Visually explain findings through annotations Written explanations Color bands around graphs Recommendations

76 General Recommendations For the Building Identify problems that result from sensing issues Continue monitoring but improve and refine data analysis abilities Link building/construction/operations knowledge with recorded data For the Owner (University) Develop a costing approach to prioritize issues Catalogue lessons learned and hire staff (from this class) For the Industry Develop soft/hardware to reliably & efficiently do what we did this quarter and make it pay back (easy, right?) For Teaching Create a broader reach through information sharing Develop deliverables for public consumption to encourage progress For Research Develop a coherent approach to refining the process (measure, analyze, respond) to make it less haphazard (PhD anyone?) For Us Continue to find small ways to save the world; they add up